Association named 'variations' was not found; perhaps you misspelled it?

I just was hunting down a strange error with this model:

class Model
  placeholder = 'variations'
  
  has_many placeholder
  
  nested_scope :verbose, :include => :variations
end

Everything, including Model.variations and Model.reflect_on_all_associations.map &:name did work (the latter returned [ :some_association, 'variations' ]).
Eventually, the quotes led me to the solution: I had to write has_many placeholder.to_sym.

When Rails can't find an association, make sure it's defined as symbol

Seemingly, that's a bug in Rails.

Dominik Schöler

makandra.de

Say thanks2

Last edit

2014-03-10

License

Source code in this card is licensed under the MIT License.

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('script end'...

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Posted by Dominik Schöler to makandra dev (2011-12-20 10:38)

Bugfix: Rails 2 does not find an association when it is named with a string instead of a symbol

Related cards:

Summary

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

Introduction

Preparation

Intro